计算机应用研究2017，Vol.34Issue(12)：3866-3868,3888,4.DOI:10.3969/j.issn.1001-3695.2017.12.078
基于改进光线投影算法的医学图像三维重建
Three dimensional reconstruction of medical images based on improved ray projection algorithm
摘要
Abstract
In order to improve the rendering speed of the classical ray-casting algorithm in 3D reconstruction of medical image,this paper proposed an improved algorithm of ray projection.On one hand,according to the observer viewpoint and the distance between different images,this algorithm used surface normal line and focused on the partial derivative of the point of tangency with viewpoint and point distance ratio to adjust the sampling frequency through the three-dimensional data field in each ray.The observer could get more detailed model representation when the object distance was close to meet the viewpoint.On the other hand,some rays which were not reaching the screen were not involved in the synthesis of ray opacity and color value calculation.The experimental results show that the improved algorithm in this study not only can effectively improve the image rendering speed,but also avoid the generation of artifacts,which can improve the quality of the image to a certain extent.关键词
光线投影/采样频率/偏导数/体绘制/三维重建Key words
ray projection/sampling frequency/partial derivative/volume rendering/3 D reconstruction分类
信息技术与安全科学引用本文复制引用
李泽宇,陈一民,赵艳,朱立峰,林靖生,吕圣卿..基于改进光线投影算法的医学图像三维重建[J].计算机应用研究,2017,34(12):3866-3868,3888,4.基金项目
上海市科技创新行动计划资助项目(16511101200) （16511101200）
数字化医疗医院示范(2012AA02A612) （2012AA02A612）
